# M

Popular questions and responses by M
1. ## math

Find the projection of the line 3x – y +2z – 1 = 0, x +2y – z = 2 on the plane 3x + 2y +z = 0.

2. ## Math

If a large factory sells its new gadgets for \$5 each it can sell 1050 per month and if it sells the same gadgets for \$9 it will sell 900 per month. Assuming the relationship between price and sales is linear predict the monthly sales of gadgets to the

3. ## Chemistry

What is the net ionic equation of reaction of MgCl2 with NaOH? I got the equation and then balanced it and then omitted the spectator ions and ended up with: Mg(OH)2(aq)--->Mg(OH) (s) I wanted to confirm to see if that was correct, thanks.

4. ## algebra

How many real square roots does -64 have?

5. ## math

A wall in Marcus's bedroom is 8 2/5 feet high and 18 1/3 feet long. If he paints 1/2 of the wall blue

6. ## MATH

If 3,p,q,24 are consecutive terms of a linear sequence, find the values of p and q.

7. ## math

If the first term of an AP is 5 and it's 100th term is -292.find it's 50th term.

8. ## Chemistry

What is the pH of a solution prepared by mixing 100. mL of 0.0500 M HCl with 300. mL of 0.500 M HF? [Ka(HF) = 7.1 × 10–4] I believe that I'd use M1V1 + M2V2 = M3V3 but I don't know where to go after that. Thanks!

9. ## calculus

A street light is at the top of a 15 foot tall pole. A 6 foot tall woman walks away from the pole with a speed of 7 ft/sec along a straight path. How fast is the tip of her shadow moving (away from the woman) when she is 50 feet from the base of the pole?

10. ## Chemistry

. For the reaction 2H2(g) + 2NO(g) → N2(g) + 2H2O(g) The observed rate law is Rate =k[NO]2[H2] The mechanisms shown below have been proposed to explain the kinetics of the above reaction Which of the following are acceptable mechanisms? Explain you

11. ## physics

How many excess electrons are there in a typical lightning bolt that has about 16 C of charge? Answer 1 x 1020 1 x 1019 10 1 x 1016

12. ## Criminal Investigation

Criminal investigation help please Discuss the searching sweep methods that should be employed when attempting to locate a bomb or Booby trap.

13. ## Science

A scientist is trying to determine the identity of an element. It is highly reactive in water and forms an ionic bond with chlorine. It is also very shiny. The element is most likely A)from group 17 B)from group 1 C)from group 15 D)a noble gas Mrs. Sue Is

14. ## English

Determine success by measurement or other objective method such as the time taken. What does that mean

15. ## Statistics Question

For a test of Ho: p = 0.5, the z test statistic equals 1.52. Find the p-value for Ha: p > 0.5.

16. ## Chemistry

Two analysts each made six determinations of the paracetamol content of the same batch of tablets. The results are shown below: ANALYST A: Paracetamol content % (m/m) = 84.32, 84.51, 84.63, 84.61, 84.64, 84.51 ANALYST B: Paracetamol content % (m/m) =

17. ## Chemistry

How many moles of the analyte P is gravimetrically equivalent to P2O5?

18. ## English

All the underlined words are in all capitals and all the bold words are in all capitals also. 1. Choose the meaning of the bold word. They appeared to me DENIZENS of a brilliant existence. (“The Bass, the River, and Sheila Mant") actors environmentalists

19. ## Math

The population of a small Midwestern town is 4500 The population is decreasing at a rate of 1.5% per year. Write an exponential decay function to model this situation. Then find the number of people in the town after 25 years.

20. ## Chemistry

Which is the strongest acid, CCl3COOH or CH2ClCOOH please explain WHY it is stronger.

21. ## math

a student answered 86 problems on a test correctly and received 98% how many problems were there on the test if they all had the same amount of points. I crossed multiplied but forgot whats next. Please don't give me the answer I just need to know what's

22. ## physics

Which of the following statements is not true about resonance? Answer It is easy to get an object to vibrate at its resonant frequencies but difficult to get it vibrate at other frequencies. A simple pendulum has many resonant frequencies called harmonics.

23. ## Engineering Physics

A 1.0-kg block is released from rest at the top of a frictionless incline that makes and angle of 37 degrees with the horizontal. An unknown distance down the incline from the point of release, there is a spring with k=200 N/m. It is observed that the mass

24. ## math

what are the different axes of rotational symmetry for a pentagonal pyramid?

25. ## Math

Name ALL sets of numbers to which each number belongs Real Rational Irrational Integer Whole Natural 0 Whole Integer Square root of 5 Irrational -80 Integer 12/3 Rational square root of 100 Irrational square root of 4 Irrational 3pi Irrational

26. ## Math

Name ALL sets of numbers to which each number belongs Real, Rational, Irrational, Integer, Whole, Natural -5/6

27. ## Chemistry

Can someone help draw/explain the Lewis Dot Structure for OPBr3. I've tried different things, but none of them seem to work.

28. ## math

The number of dogs and chickens on a farm add up to 14. The number of legs between them is 36. How many dogs and how many chickens are on the farm if there are at least twice as many chickens as dogs?

29. ## Chemistry

Arrange the following aqueous solutions in order of increasing boiling point, explain your answer: 0.120 m glucose (C6H12O6), 0.05 m LiBr, 0.05 m Zn(NO3)2. Using data the boiling point constants given in the test book, calculate the boiling points of each

30. ## CHEM

Arrange the elements in decreasing order of the number of valence electrons Br,S,Sb,Sr,F,Mg,I,Ca,Na,Kr,Xe,Bi,Ge,Ga,K

31. ## Sociology

Please check my answers. 1. All societies use technology, but the chief characteristic of postmodern societies is technology that increase the ability to A. Use fossil fuels more efficiently B. Analyze information, communicate, and travel* C. Employ more

32. ## History

African Americans in the North greeted the Emancipation Proclamation A.regretfullb B.joyful C.angrily D.sad A? 2. On Jan 1 1863 President Abe Lincoln signed the A.Free slave Bill B.14th Amendment C.Emancipation Proclamation D.13th Amendment C? 3.Which

33. ## Math

Real, Rational, Irrational, Integer, Whole, Natural 35.99 Real Ratio

34. ## chem

What is the correct name of the compound that is incorrectly named 1-chloro-3-pentyne?

In the early 1900s, Alfred Wegener noticed that some of the Earth's continents looked like they might fit together like a jigsaw puzzle. He also observed that the continents that looked like they fit together had similar plants, animals, and rock

36. ## Chemistry

The fizz produced when an Alka-Seltzer® tablet is dissolved in water is due to the reaction between sodium bicarbonate (NaHCO3) and citric acid (H3C6H5O7): In a certain experiment 1.45g of sodium bicarbonate and 1.45g of citric acid are allowed to react.

37. ## Physics (Gravitation)

In Fig. 13-25, three particles are fixed in place. The mass of B is greater than the mass of C. Can a fourth particle (particle D) be placed somewhere so that the net gravitational force on particle A from particles B, C, and D is zero? If so, in which

38. ## english lit

I am writing a paper on "On the Amtrak from boston to new york city" by sherman alexie. I need to detail how the poet used literary conventions and poetic devices such as meter, imagery, and symbolism to communicate the meaning of the poem. I have the

39. ## math

Which quadrilaterals have a)perpendicular diagonals b)opposite angles congruent? c) two pairs of parallel sides? d) a pair of congruent, adjacent sides? My answers a)rhombus and square b)rhombus, square, and parallelogram c)parallelogram, rectangle, and

40. ## Astronomy

1. How did the geocentric model explain the retrograde motion of planets? A. Earth moves faster in its orbit and passes the other planets. B. The planets move backward when they get too close to earth. C. The planets travel in circles as they move around

41. ## math

Marcus bought r movie posters for \$5 each. Write an algebraic expression for total amount Marcus spent.

42. ## Math

Bacteria can multiply at an alarming rate when each bacteria splits into two new cells, thus doubling. If we start with only bacteria which can double every hour, how many bacteria will we have by the end of the day?

43. ## History

"And I further declare and make known that such persons of suitable condition will be recevied into the armed service of the US to garrison forts positions stations and other places and to man vessels of all sorts in said service." What did this portion of

44. ## math

1.Can a small child play with a fat child onthe see-saw?

45. ## Chemistry

Octane has a density of 0.692 at 20degree C . How many grams of O2 are required to burn 17.0gal of C8H18 ? Step-by-step explanation much appreciated with as much detail as possible so I can understand. Thanks!

46. ## math

Give a counterexample to show that each of the following generalizations about the set of integers {-3,-2,-1,0,1,2,3} is false. a) closure property for division b) distributive property for division over addition.

47. ## Astronomy

A quasar with an observed luminosity of L=1012L⊙ is shining at the Eddington limit, with a net efficiency of 10%. What is the mass accretion rate (in units of M⊙year−1)?

48. ## Sociology

Please check my answers. 1. Population growth is an issue because A. sociologists cannot track all the social groups that arise. B. infrastructure within cities is insufficient. C. it goes hand in hand with lowered life expectancy. D. natural resources are

49. ## Sociology

Please check my answers. My answers have * by them. 1. In _______, citizenship in the society automatically makes a person a member of the religion. A. churches* B. sects C. ecclesia D. cults 2. Jews, Christians, and Muslims all believe in one God who, as

50. ## Sociology

A rational-legal authority figure would most likely be someone like a A. war chief B. principle of a school C. religious leader D. parent My guess is A

51. ## chemistry

a cylinder filled with a movable Piston contains liquid water in equilibrium water vapour at 25 degree Celsius which one of the following operations result in a decrease in equilibrium vapour pressure

52. ## Government

1. Read this excerpt from the textbook about state legislators. " The rate of turnover and legislative seats is fairly high although it tends to vary from state to state and time to time. In a given year some 20% of all lawmakers around the country are

53. ## American Government

Please check my answers 1. Political parties and interest groups differ in which of the following ways? A. Individual interest groups infuse more money into politics than political parties. B. Interest groups represent ideologies of members, whereas

54. ## CHEM

Why is CH 4 nonpolar whereas CH 3 Cl is polar?

55. ## Chemistry

The decomposition of hydrogen peroxide is first order in H2O2: 2H2O2(aq) → 2H2O(l) + O2(g) Rate = k [H2O2] How long will it take for half of the H2O2 in a 10-gal sample to be consumed if the rate constant for this reaction is 5.6 x 10-2 s-1?

56. ## math

The number of patients treated at Dr. Artin’s dentist office each day was recorded for nine days. These are the data: 6, 6, 6, 5, 5, 6, 5, 6, 5. Find the mean, median, mode, and range of the data. If necessary, round to the nearest tenth

57. ## Physics

A 0.3 kg ball strikes a wall head on and then rebounds straight back. The initial speed was 10.0 m/s and the speed after it rebounds was 1.9 m/s. What was the magnitude of the total impulse on the ball during the collision in N*s?

58. ## Chemistry Question (oxide acidity)

Which of the following oxides is the most acidic? A. Al2O3 B. P4O10 C. SO3 D. MgO E. SiO2

59. ## Physics (Rolling)

In Fig. 11-35, a solid brass ball of mass m will roll smoothly along a loop-the-loop track when released from rest along the straight section. The circular loop has radius R, and the ball has radius r

60. ## math

A spherical snowball is melting in such a way that its diameter is decreasing at rate of 0.2 cm/min. At what rate is the volume of the snowball decreasing when the diameter is 9 cm.

61. ## calculus

The altitude (i.e., height) of a triangle is increasing at a rate of 2 cm/minute while the area of the triangle is increasing at a rate of 4.5 square cm/minute. At what rate is the base of the triangle changing when the altitude is 8 centimeters and the

62. ## Calculus

Find a second degree polynomial f(x) (of the form ax2+bx−4) that has a local extrema at (−1/2,−9/2).

63. ## Sociology

Your parents own their own business and they do very well financially. They are very independent and take responsibility for all of their business and personal costs. Based on the information provided, which political party are your parents a member of? A.

64. ## American Government

Check my answers please 1. Which of the following describe the role of an entrepreneur in a capitalist economic system? (I need to select 2) A. Someone who combines the factors of production into a business B. Someone who decides how much regulation the

65. ## Chem

What is the pH of a 0.115 mol/L solution of sodium acetate, CH3COONa, at 25oC? (pKa=4.74 at 25oC for CH3COOH.)

66. ## physics

four particles of masses 1kg, 2kg,3kg, and 4kg are at vertices of a rectangle of sides a and b.if a=1m and b=2m find the location of the center of mass

67. ## School

When given three given kinds of meat, three kind of cheese, and three kinds of bread of bread. Lisa can make 27 kinds of sandwich. I cannot figure out what piaget stage this is?

68. ## Case Study

Darlene's parents believe that her extra weight is baby fat and aren't concerned about it. What are some of the physical and social consequences of obesity that darlene may experience? What does these question mean?

69. ## Science

What is the pattern with these fractions 1/4 1/9 1/16 1/25

70. ## Science

True or False Another name for chemical change is chemical bond

71. ## Math

Brenda's School is selling tickets to a spring musical. On the first day of ticket sales the school sold 3 senior citizen tickets and 9 child tickets for a total of \$75. The school took in \$67 on the second day by selling 8 senior citizen tickets and 5

72. ## History

Describe amendment 6 in your own words which is : Right to speedy public trial Answe r: If you've committed a crime you have the right to have a trial right away

73. ## Math

Richard Simons is selling his house. He has a choice of taking \$125,000 today or \$135,000 in 6 months. If he takes the money today, he can invest it at Valley Bank at 5% interest compounded monthly. a) How much would be in the account after six month if he

74. ## chemistry

If 24.0 L of O2 burns completely a sample of carbon disulfide, how many moles of sulfur dioxide (SO2) will be produced at 15 degrees Celsius at a pressure of 1.3 atm? CS2 + 3O2 -> CO2 + 2SO2

75. ## Chemistry

Given…Overall reaction: 2 NO2 (g) + F2 (g) → 2 NO2F (g) Rate = k[NO2][F2] a. Can this be a single step reaction? b. Postulate a mechanism using experimental data and chemical intuition come up with a mechanism that fits.

76. ## chemistry

anyone help me . .what volume of concentrated HCL solution whoch is 36% by mass and has a density of 1.179 g/ml , should be used to make 4.7 L of hcl solution with a pH of 1.8 ?

77. ## MATH

What is the 9th term -1/18 1/6 -1/2

78. ## geometry

what are the symmetry properties of a regular octahedron and a cube?

79. ## math

The 20 leaves of a 40-page book are numbered 1 through 40. The first and last leaves are ripped out. What is the sum of the remaining page numbers?

80. ## bio

A corn plant producing ears of corn is an example of: a.growth b.reproduction c.development d.all of these

81. ## Astronomy

1. What color are stars that are very hot and very bright? A. Red B. Blue C. White D. Yellow 2. During the contraction of a protostar, density increases and ______ rises. A. Nuclear energy B. Dust C. Temperature D. Outflow 3. What is the apparent

In a local lottery, there is a 15% chance of winning \$1, a 5% chance of winning \$5, a 1 in 100 chance of winning \$50 and a 1 in 10 000 chance of winning \$500. What is the expected value of your winnings in this lottery? How much does the lottery need to

83. ## Government

Please help me with government 1. The 10th amendment to the Constitution reads as follows: " The powers not delegated to the United States by the Constitution, nor prohibited by it to the States, are reserved to the States respectively, or to the people."

84. ## social studies

5, which statement best explains how the conflict over tariff of 1828 was resolved The US Supreme Court ruled against the tariff Daniel Webster gav a speech to the Senate and the tariff was repealed South Carolina passed the nullification Act which

85. ## Children Development

In what ways have factors from Microsystems outside the family, from the mesosystem, and the exosystem possibly influenced your child’s development at ages 6, 8 and 10? Find four examples of such influences and make clear why you believe they should be

86. ## Math

Patton is organizing his stamp collection into ab ook. He has 42 foreign stamps and 70 US stamps. He wants every page to have the same number of foreign stamps and the same number of US stamps. If he puts the greatest number of stamps on each page, how

87. ## Math

The population of Winnemucca Nevada can be modeled by P=6191(1.04)^t where t is the number of years since 1990. What was the population in 1990? By what percent did the population increase by each year?

88. ## Science

Which is most likely to be part of an ionic bond? A. An atom with no valence electrons B. An atom with one valence electron C. An atom with two valence electrons D. An atom with three valence electrons I think it is B.

89. ## Language Arts

The word ensemble is an English word borrowed from French, based on the French word meaning "together." In which of the following sentences is the word used incorrectly? A. The string quartet is a popular ensemble, and it always plays at graduation. B.

90. ## Science

Are these equations balanced or unbalanced 3. Cu+H2SO4 Yields CuSO4+H2 Balanced 4. 2Fe+3S Yields Fe2S3 Balanced 5.N2+H2 Yields NH3 Unbalanced Answer this Questio

91. ## Science

Are these equations balanced or unbalanced 6. 2AlN Yields 2Al+N2 Balanced 7.Mg(OH)2+2HCl Yields MgCl2+2H2O Balanced 8. K+H2O Yields H2+KOH Unbalanced

92. ## English

"Ideas are great arrows but there has to be a bow" What is the meaning of this quote Answer : Ideas can only be shot forward by being focused and aiming towards them?

93. ## CHEM

What is the IUPAC name for the molecule shown here? H I \ / C=C / \ I H

94. ## CHEM

Identify the class of compounds that contains each of the following functional groups. a carbonyl group between two carbon atoms

95. ## chemistry

a C4H8(g)+â O2(g)⟶ ã CO2(g)+ä H2O(g) balance this equation put a coefficient in a,b,y,d to balance equation please help

96. ## Writing skills 1

1. Which of the following is correct in regard to the use of formal English? A. Formal English is used more frequently in speaking than in writing. B. In formal business correspondence, it's best keep the language impersonal. C. Contractions are considered

97. ## Chemistry

How do you solve this: if 24.0 L of O2 burns completely a sample of carbon disulfide, how many grams of sulfur dioxide will be produced at 15 degrees celcius at a pressure of 1.3 atm? (the answer is 45.7 g). CS2 + 3O2 -> CO2 + 2SO2

98. ## Chemisrty

How do you solve this: if 24.0 L of O2 burns completely a sample of carbon disulfide, how many grams of sulfur dioxide will be produced at 15 degrees celcius at a pressure of 1.3 atm? (the answer is 45.7 g). CS2 + 3CO2 -> CO2 + 2SO2